Want to see how your eyes stack up against other photographers when it comes to seeing colors? Try your hand at Color, a simple browser-based color matching game that tests you in how quickly you can match colors. It starts with simple matching, but soon moves onto more difficult challenges involving multiple colors. Be sure to leave a comment here reporting on the score you get!
In a paper published in Science this week, Japanese researchers reported on a discovery that jumping spiders use a method for gauging distance called “image defocus”, which no other living organism is known to use. Rather than use focusing and stereoscopic vision like humans or head-wobbling motion parallax like birds, the spiders have two green-detecting layers in their eyes — one in focus and one not. By comparing the two, the spiders can determine the distance from objects. Scientists discovered that bathing spiders in pure red light “breaks” their distance measuring ability. Read more…
Here’s something that’ll blow your mind (sorry that it’s an ad): stare at the colored dots on this girl’s nose for 30 seconds, then quickly look at a white wall or ceiling (or anything pure white) and start blinking rapidly. Congratulations, you just processed a negative with your brain!
Here’s a quick and simple tip for better portraits by Reddit user rmx_:
Everyone has a lazy eye. By that, I mean one eye is always smaller and/or more closed than the other eye. In some people, it is very easy to spot; in others, nearly impossible. The “beautiful people” have more symmetrical faces, but still, one eye will open more than the other. (Denzel Washington has one of the most I have seen […])
[…] here is the tip: get the smaller/lazier eye slightly closer to the camera. Oh, and don’t tell the person what you’re looking at their eyes for! You’ll make them self conscious. Simply ask them to look at your finger and move their head to follow it, and then guide them left or right as necessary. Chances are, the movement needed will not be so much that you have to adjust your lights.
Photographer Daniel Fox captured this beautiful (and spooky) photograph of dozens of pairs of caiman eyes staring back at him in the darkness.
Depending on the angle between the reptile and the camera flash, a different colour is produced. Caiman eyes have a layer called tapetum behind their retina, containing crystals that reflect light and make night vision possible. [#]
The photograph was made at a Yacare Pora farm in Ituzaingo, Argentina.
Image credit: Photograph by Daniel Fox and used with permission
After seeing his close-up photographs of human eyes become enormously popular last year, photographer Suren Manvelyan turned to a more difficult subject: animals. He somehow managed to create a series of photographs showing the stunning eyes of animals ranging from crocodiles to horses. Read more…
We’ve shared a couple stories in the past month on how human eyes are very subjective and horrible as light meters, and here’s yet another mind-boggling example of how easily our eyes can be fooled by context. In the image above, the “blue” and the “green” stripes are exactly the same color.
What if in the future, the human eye itself could be turned into a camera by simply reading and recording the data that it sends to the brain? As crazy as it sounds, researchers have already accomplished this at a very basic level:
In 1999, researchers led by Yang Dan at University of California, Berkeley decoded neuronal firings to reproduce images seen by cats. The team used an array of electrodes embedded in the thalamus (which integrates all of the brain’s sensory input) of sharp-eyed cats. Researchers targeted 177 brain cells in the thalamus lateral geniculate nucleus area, which decodes signals from the retina. The cats were shown eight short movies, and their neuron firings were recorded. Using mathematical filters, the researchers decoded the signals to generate movies of what the cats saw and were able to reconstruct recognizable scenes and moving objects. [#]
Basically, the scientists were able to tap into the brain of a cat and display what the cat was seeing on a computer screen. Something similar was accomplished with humans a few years ago, and scientists believe that in the future we may even be able to “photograph” human dreams!
As the low-light capabilities of high-end (and even low-end) cameras rapidly improve, it’s easy to marvel at technology and forget how amazing our own eyes are, but here are some mind-boggling facts to consider: did you know that the human eye can detect as few as two photons entering the retina, and that, under ideal conditions, a healthy young adult can see a candle flame from 30 miles away? To see how mind-boggling that is, try using Google Maps to find a location 30-miles away from where you live.